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Rugose Wood-Complex

English term (RW for short) for a group of vine wood diseases that are presumably caused by viruses. These include corky bark disease (corky bark), stem grooving and stem pitting. The causes are not yet fully understood, but probably involve virus groups such as grapevine clostrovirus A and B and various leafroll virus complexes. All of these diseases lead to at least a reduction in yield and a significantly reduced lifespan of the vines. The diseases are usually transmitted or spread (at least in Europe) during grafting through infected rootstocks (rootstocks) or scions (tops). Only in Mexico and the southern USA has a scale insect been identified as a vector (in the case of corky bark). The symptoms of the various diseases are very similar because the wood and the bark are affected by the infection.

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